Screen.



O. KELLY.

SCREEN.

APPLlCATiON-HLED MAR. 13. 1915.

Attorneys Patented May 9,1916.

2 SHEETS-SHEET! ms qzwmam wumomzhpn cc.. WASHINGTON n c 0. KELLY SCREEN.

APPLICATION FILED MAR. 13, 1915 Patented May 9,1916.

0 2 SHEETSSHEET 2.

17 z j} j L- l j J I 2% r .Z 4 x 111i 2' Z if Attorney ORIN KELLY, OF ATHENS, OHIO.

SCREEN.

Specification of Letters Patent.

Patented May 9?, 1916 Application filed March 13, 1915. Serial No. 14,249.

To all whom it may concern Be it known that I, ORIN Kermit, a citizen "of the United States, residing at Athens, in the county of Athens and State of Ohio, have invented a new and useful Screen, of which the following is a specification.

The structure forming the subject matter of this application is a sorting or segregating device of that type used at coal mines and elsewhere, the mechanism embodying a pair of superposed screens mounted to reciprocate, the advancement of the material along the screens being brought about by reason of the fact that each screen has markedly different lineal speeds at the ends of its stroke.

The objects of the invention are to improve the mechanism whereby the screens are actuated: to provide novel means for supporting the screens for reciprocating movement: to provide novel means for reciprocating the feeder plate whereby the material in unsorted'condition is advanced onto one of the screens: and to provide a novel means for mounting the screens and the mechanism for driving the same upon a frame which in its turn is adapted to have a slight movement with respect to the tipple or supporting structure, thereby to nullify or reduce the shocks upon the supporting structure, it being a matter of common knowledge that owing to the difference in weight between the screens and the material carried thereby, such shocks actually occur and must be compensated for in the absence 7 of a device such as that disclosed in the pres ent invention by massive and especially designed foundations.

It is within the scope of the disclosure to improve generally and to enhance the utility of devices of that type to which the present invention appertains.

With the above and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can be made within the scope of what is claimed, without departing from the spirit of the invention.

In the accompanying drawings :Fi gure 1 shows theinvention in top plan; Fig. 2'

is a side elevation wherein sundry parts are broken away; Fig. 3 is a cross section on the line 33 of Fig. 2; Fig. 4 is a cross section on the line 44: of Fig. 2; Fig. 5 is a sectional View, diagrammatic in nature and illustrating a portion of the mechanism whereby the feeder is actuated.

In the drawings, the numeral 1 indicates a substructure or tipple, the word tipple be ing used to designate the frame work or tracks 3 and 4: being clearly understood when Fig. 2 is compared with Figs. 3 and 4. Mounted between the tracks 3 and 4: and serving to support the frame 2 are rollers 6 or other anti-friction elements, side flanges 5 preventing a lateral movement of the rollers when the 'anti-friction elements are of that form. I

- The numeral 7 indicates a delivery chute from which the material in an unsorted or partly graded condition is delivered onto one of the reciprocating screens to be described hereinafter. The delivery chute 7 may be supported upon standards 8 connected with the frame 2. A feeder 9 receprocates beneath the delivery chute 7 and may be upheld on wheels 10 carried by axles 11, the wheels being adapted to transverse the tracks 12 on the supporting frame 2. The invention includes a reciprocating upper screen 18, supported in a novel manner by a plurality of shafts and rock arms, one shaft and a single pair of rock arms only being disclosed in the drawings. The numeral 14- indicates the shaft above alluded to and the same ordinarily is fixed in the side portions of the support 2 to brace and support the structure. Arms 15 are mounted torock on the ends of the shaft 14, each arm terminating at its upper end in an arcuate head 16 the radius of curvature of which is greater than the distance from the axis of the shaft 14 to the crown of the head. The upper screen 18 is provided with tracks 17 which rest on the arcuate heads 16 of the rock arms 15.

The invention comprises a lower screen 19 embodying in some instances a frame 20 between the constituent members of which is located and held a screen extension 21. Mounted in the frame 20 of the lower screen 19 is a tie member 22 which may be in the form of a rod or bar, the ends 23 of which are received for rocking movement in the lower ends of the arms 15.

Upheld by the support 2, as shown in Fig. 1, is a bed 24 equipped with bearings 25 in which is mounted to rotate a drive shaft 26 carrying a pulley 27 or its mechanical equivalent. Secured to the drive shaft 26 is a sprocket wheel 28. Mounted to rock in bearings 29 on the bed 24L is a shaft 30.

Noting particularly Fig. 5, it will be ob served that the invention comprises an eccentric 31, the hub 32 of which is-bushed as shown at 33 and is journaled to rotate on the shaft 30. Lateral movement of the eccentric 31 in one direction is prevented by a collar 341 secured to the shaft 30. Keyed as shown at 33 to the hub 32 of the eccentric 31 is a sprocket wheel 36 restrained against lateral movement by means of a set collar 37 on the shaft 30. A sprocket chain 38 forms an operative connection between the sprocket wheel 36 and the sprocket wheel 28. The eccentric 31 is surrounded by a strap 39 carrying a rod 10 connected as shown at 11, pivotally, to the feeder 9.

It will now be understood that when the drive shaft 26 is rotated, the eccentric 31 will be rotated on the shaft 30 by means of the sprocket wheels 36 and 28 andthe chain 38, a reciprocating movement being given to the feeder 9 by means of the rod 40 and the eccentric strap 39. The feeder 9 serves to advance material out of the delivery chute 7 onto the upper screen 18 and importance is attached to the specific means for operating the feeder 9 since it is compact in form and does away with links, an extra shaft and other elements heretofore considered expedient or necessary as a portion of the means for reciprocating the feeder.

At its ends, the drive shaft 26 is provided with crank arms 12 united by relatively short connecting rods 4C3, pivotally, with extensions 4-4 constituting parts of rock arms 15 secured to the shaft 30 or mounted to swing thereon. Connecting rods 16 unite the upper ends of the rock arms 45 with the upper screen 18, as shown at 4:7, connecting rods l8 operatively uniting the lower ends of the rock arms &5 with the lower screen 19 as indicated at 419.

It will now be understood that the driving train for actuating the screens 18 and 19 comprises the rods 16 and 48, the rock arms 15 and their extensions 44, the connecting rods 43, the crank arms 12 and the power driven shaft 26.

The screens 18 and 19 move in opposite directions and are so connectedv and united that they balance each other, shocks on the tipple or substructure 1 being avoided. Further, owing to the manner in which the heads 16 of the rock arms 15 cooperate with the upper screen, the upper screen moves vertically as it is reciprocated, the weight of the upper screen and its contents being made effective to lessen the shocks and to counterbalance the screens. This result is brought about by reasonof the fact that the heads 16 are not curved upon arcs the center of which is the axis of the shaft 1%.

Noting the specific construction of the crank arms 12 and the connecting rods 43, it will be understood clearly that the construction is such that markedly different lineal speeds will be imparted to the screens 18 and 19, severally, at the ends of their stroke and owing to this fact the material which is being screened will be advanced, even though the screens set level.

Importance is attached to the fact that the screens and the actuating mechanism therefor are mounted on the support 2 which, in its turn, is adapted tov move on the tipple structure 1, owing to the presence of the tracks 3 and 1, and the rollers 6 or their mechanical equivalents. This movement of the support 2 on the tipple 1 is very slight and in no way interferes with the operation of the structure. It is, however, present and existing and prevents the possibility of shocks being carried into the tipple or substructure 1. I A

Having thus described the invention, what is claimed is 1. In a device of the class described, a support; a screen mounted to reciprocate with respect to the support and carried by he pp rt; a d v ng means moun e o the support and operatively connected with he r n. for e p a ng the screen; n means for upholding the support, the screen and its actuating mechanism, as an'entity, for continuous limited movement during the entire time that the driving means is in operation. i

2. In a device of the class described, a support; a pair of superposed, reciprocating screens carried by the support; means for connecting the screens for simultaneous operation; driving means mounted on the support for actuating the screens; and means for upholding the support, the screens and the actuating means as a unitary structure, for continuous limited movement during the entire time that the driving means is in operation, thereby to lessen shocks caused by a reciprocation of the screens.

3, In-a device of the class described, cooperating elements comprising a sub-structure and a superposed support, one of which cooperating elements is provided with an inclined track; an anti-friction device 00- acting with the inclined track and with the other of said cooperating elements to permit a free movement of the support; a screen mounted for reciprocation on the support; and means carried by the support and independent of the sub-structure, for reciproeating the screen.

4. In a device of the class described, a support; a rock arm mounted to swing on the support and provided adjacent its upper end with an arcuate head curved on an are of greater radius than the radius of swinging movement of the arm; an upper screen; a track carried by the upper screen and coacting with the head to support the upper screen; and a lower screen assembled with the rock arm.

In testimony that I claim the foregoing as my own, I have hereto affixed my signature in the presence of two witnesses.

ORIN KELLY.

Witnesses:

J. H. Bon'rs, C. H. HERN.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents. Washington, D. 0." 

